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GutterFilter's ultimate rain-handling capacity is rated at 10 times your normal rainfall. This extra capacity is essential for handling heavy water flow from roof valleys.

The flow of water is often so intense and so fast on steep roofs and in valleys, it's a challenge for most other gutter protection devices to handle.

GutterFilter will easily handle heavy flows of rainwater on steep roofs and valleys. This material handles high flow rates of up to 24 inches of rain per hour, which is ten times the average rain fall. Just watch this demonstration of our bucket brigade. Some people initially think GutterFilter is some type of sponge. However, a sponge is designed to soak up and hold water.

Some have even suggested that they could cut up some foam cushion and put it in their gutters instead of GutterFilter. Such foams are not like GutterFilter; they are not porous, and they will not work in your gutters! So, GutterFilter easily handles heavy water flow, where other products fail.